/*
Assignment 1
Class ID        : SE0691
Group           : 1
Due Date        : 20 November 2012
I declare that this assignment is my own work
in accordance with FPT Policy.
*/
package edu.fpt.servlet;

import edu.fpt.dal.ApartmentDAL;
import edu.fpt.dal.RequestServicesDAL;
import edu.fpt.dal.ServicesDAL;
import edu.fpt.hib.Apartment;
import java.io.IOException;
import java.io.PrintWriter;
import java.util.ArrayList;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

/**
 *
 * @author Admin
 */
public class DeleteServiceServlet extends HttpServlet {

    /**
     * Processes requests for both HTTP
     * <code>GET</code> and
     * <code>POST</code> methods.
     *
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    protected void processRequest(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        response.setContentType("text/html;charset=UTF-8");
        PrintWriter out = response.getWriter();
        try {
            /* TODO output your page here. You may use following sample code. */
            out.println("<html>");
            out.println("<head>");
            out.println("<title>Servlet DeleteServiceServlet</title>");            
            out.println("</head>");
            out.println("<body>");
            ArrayList<Apartment> listApart = ApartmentDAL.listAllUsing();
            String serviceid = request.getParameter("serviceid");
            for(Apartment apart : listApart){
                String newusing = ServicesDAL.removeFromList(apart.getUsingServices(), serviceid);
                apart.setUsingServices(newusing);
                ApartmentDAL.update(apart);
            }
            RequestServicesDAL.deleteByServices(serviceid);
            ServicesDAL.delete(serviceid);
            response.sendRedirect("admin/services.jsp");
            
            out.println("</body>");
            out.println("</html>");
        } finally {            
            out.close();
        }
    }

    // <editor-fold defaultstate="collapsed" desc="HttpServlet methods. Click on the + sign on the left to edit the code.">
    /**
     * Handles the HTTP
     * <code>GET</code> method.
     *
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    @Override
    protected void doGet(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        processRequest(request, response);
    }

    /**
     * Handles the HTTP
     * <code>POST</code> method.
     *
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    @Override
    protected void doPost(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        processRequest(request, response);
    }

    /**
     * Returns a short description of the servlet.
     *
     * @return a String containing servlet description
     */
    @Override
    public String getServletInfo() {
        return "Short description";
    }// </editor-fold>
}
